Flynn tweeted: "For everyone who's been asking after the #BF4 reveal, #DA3 and the next Mass Effect are also using Frostbite 3. It's awesome."
While the Dragon Age 3 press release was explicit, looking back certain BioWare devs were coyer on the matter. BioWare Montreal Studio Director Yanick Roy only said in a November 2012 blog post that DA3 used Frostbite tech, not specifically Frostbite 2. That correlates with the careful wording of DA3 Executive Producer Mark Darrah, who in an announcement post said his studio was working on a new game engine for DA3, and that it had "started with Frostbite 2 from DICE as a foundation to accomplish this."
So Battlefield 4 isn't the only Frostbite 3 game confirmed to be arriving this year, as Dragon Age 3 is scheduled for a "late 2013" release.